3, high blood lipid, high blood lipid will lead to slow blood flow, resulting in insufficient blood supply to the brain and heart ischemia, lack of oxygen, resulting in dizziness, chest tightness; 4, coronary heart disease, reduced blood supply to the heart muscle, poor blood pumping function of the heart, resulting in poor blood circulation to the organs, resulting in dizziness, chest tightness. It is necessary to perform electrocardiogram examination in a timely manner and apply medication to dilate blood vessels and improve myocardial circulation.